Nehemiah 8:14

8:14 They discovered written in the law that the LORD had commanded through Moses that the Israelites should live in temporary shelters during the festival of the seventh month,

Nehemiah 8:18

8:18 Ezra read in the book of the law of God day by day, from the first day to the last. They observed the festival for seven days, and on the eighth day they held an assembly as was required.